TY  - BOOK
AU  - Woolley,P.O.
AU  - Perry,C.A.
AU  - Larson,D.L.
ED  - United States.
TI  - El Salvador
PY  - 1972///
CY  - Washington, D.C.
PB  - U.S. Dept. of Health, Education and Welfare, Office of International Health, Division of Planning and Evaluation
KW  - Public health
KW  - Socioeconomic factors
KW  - El Salvador
ER  -